Thermoplastic starch and poly(ε-caprolactone) blends: morphology and mechanical properties as a function of relative humidity

Mahieu, A.; Terrié, Caroline; Agoulon, A.; Leblanc, Nathalie; Youssef, B.

doi:10.1007/s10965-013-0229-y

Cited by 33 publications

(18 citation statements)

References 40 publications

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“…Other researchers focused their attention to TPS with retrogradation resistance and good mechanical properties obtained by using plasticizers containing amide groups (such as formamide and acetamide) (Dai, Chang, Yu, Geng, & Ma, 2010;Ma & Yu, 2004a, 2004bMa, Yu, & Feng, 2004); however, in this case, the main drawback is the high toxicity of these reactants. For all these intrinsic problems, biodegradable polyesters are usually associated with TPS (Ayana, Suin, & Khatua, 2014;Bocchini, Battegazzore, & Frache, 2010;Li, Luo, Lin, & Zhou, 2013;Mahieu, Terrié, Agoulon, Leblanc, & Youssef, 2013;Schwach, Six, & Avérous, 2008), but, in this case, the advantage of low cost is partially lost.…”

Section: Introductionmentioning

confidence: 99%

Isosorbide, a green plasticizer for thermoplastic starch that does not retrogradate

Battegazzore

Bocchini

Nicola³

et al. 2015

Carbohydrate Polymers

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Section: Introductionmentioning

confidence: 99%

Isosorbide, a green plasticizer for thermoplastic starch that does not retrogradate

Battegazzore

Bocchini

Nicola³

et al. 2015

Carbohydrate Polymers

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“…All films were stored in controlled chambers at 53% RH. Various parameters are known to influence the properties of thermoplastic starch, in particular the nature and amount of plasticizer [26], the humidity rate in the film [15], the treatment used to plasticize starch [27] and the material ageing [26]. All the materials studied here contain 20% w/w of glycerol relative to the proportion of starch, they have been extruded on the same equipment with the same parameters and have been conditioned at the same humidity rate during two weeks before testing.…”

Section: Sample Preparationmentioning

confidence: 99%

“…The spectrum of ascorbic acid presents a characteristic peak at 1750 cm −1 corresponding to the carbonyl group and which is not present in TPS. Similarly to the PCL enrichment factor previously used to study TPS-PCL blend films [15], an ascorbic acid enrichment factor can be defined according to the equation 1:…”

Section: Fourier Transform Infrared Spectroscopy (Ftir)mentioning

confidence: 99%

“…PCL is also used with additives to develop antimicrobial and compostable food packaging [14]. It has been shown, in previous work, that blending 30% PCL (50 000 g/mol) with TPS leads to an homogeneous material [15]. The surface affinity for water of the material is reduced as well as the variability of their mechanical properties with humidity, even if the effect of the blend on film water sorption is low.…”

Section: Introductionmentioning

confidence: 99%

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Research Article. Role of ascorbic acid and iron in mechanical and oxygen absorption properties of starch and polycaprolactone multilayer film

Mahieu¹,

Terrie²,

Leblanc³

2017

Packaging Research

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A trilayer film based on thermoplastic starch (TPS) for the core layer and poly(ϵ-caprolactone) (PCL) for the skin layers was obtained by coextrusion. Ascorbic acid and iron powder were added at respectively 15% and 1.5% w/w in the TPS layer for their capacity to act as oxygen scavenger, making the film usable as active food packaging. This study demonstrates that these compounds also play a role in the interactions between the different layers. FTIR measurements show that ascorbic acid migrates at the interface between TPS and PCL, where it acts as a compatibiliser between both polymers, probably by creating new interactions between polar functions of both polymers. This leads to a better adhesion of the different layers, demonstrated by the increase of the adhesion energy from 4.10 −3 N·mm −1 for the multilayer film TPS-PCL to 12.10 −3 N·mm −1 for the multilayer film containing the active components. Thanks to this compatibilising effect, the mechanical properties of the multilayer film containing ascorbic acid and iron are widely improved with an average maximal tensile strength of 7 MPa, against 3.7 MPa for the multilayer film without the active components and with an elongation at break of respectively 1450% against 290%. However, despite the hydrophobicity of PCL, the water sorption of the TPS-based layer is only slightly reduced. The multilayer film shows active oxygen scavenging properties but the rate of this reaction is divided by two compared to the active film without PCL layers (15 days to reach less than 1% oxygen for the active film without PCL layers and approximately 30 days to reach the same oxygen level with the multilayer active film).

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“…Amylose is a linear polymer of α‐1,4‐linked glucose units, whereas amylopectin is a branched polymer of α‐1,4‐linked glucose segments connected by 1,6‐linkages . Recently, numerous works have been investigated to incorporate starch into the biodegradable polymers, including PHB , PLA , PCL , and PBSU . The combination of those biodegradable polymers and starch would exploit their respective merits to widely expand their applications.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of biodegradable polymer blends from poly(3‐hydroxybutyrate)/poly(vinyl acetate)‐modified corn starch

Lai

Sun

Don

2015

Polymer Engineering & Sci

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Biodegradable polymer blends prepared by blending poly(3‐hydroxybutyrate) (PHB) and corn starch do not form intact films due to their incompatibility and brittle behavior. For improving their compatibility and flexibility, poly(vinyl acetate) (PVAc) was grafted from the corn starch to prepare the PVAc‐modified corn starch (CSV). The resulting CSV consisted of 47.2 wt% starch‐g‐PVAc copolymer and 52.8 wt% PVAc homopolymer and its structure was verified by FT‐IR analysis. In comparison with 35°C of the neat PVAc, the glass transition temperature (Tg) of the grafted PVAc chains on starch‐g‐PVAc was higher at 44°C because of the hindered molecular mobility imposed from starch on the grafted PVAc. After blending PHB with the CSV, structure and thermal properties of the blends were investigated. Only a single Tg was found for all the PHB/CSV blends and increased with increasing the CSV content. The Tg‐composition dependence of the PHB/CSV blends was well‐fitted with the Gordon‐Taylor equation, indicating that the CSV was compatible with the PHB. In addition, the presence of the CSV could raise the thermal stability of the PHB component. It was also found that the presence of the PHB and PVAc components would not hinder the enzymatic degradation of the corn starch by α‐amylase. POLYM. ENG. SCI., 55:1321–1329, 2015. © 2015 Society of Plastics Engineers

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Thermoplastic starch and poly(ε-caprolactone) blends: morphology and mechanical properties as a function of relative humidity

Cited by 33 publications

References 40 publications

Isosorbide, a green plasticizer for thermoplastic starch that does not retrogradate

Isosorbide, a green plasticizer for thermoplastic starch that does not retrogradate

Research Article. Role of ascorbic acid and iron in mechanical and oxygen absorption properties of starch and polycaprolactone multilayer film

Preparation and characterization of biodegradable polymer blends from poly(3‐hydroxybutyrate)/poly(vinyl acetate)‐modified corn starch

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